22256228 has 12 divisors (see below), whose sum is σ = 39497472. Its totient is φ = 10971240.

The previous prime is 22256209. The next prime is 22256231. The reversal of 22256228 is 82265222.

It is a self number, because there is not a number n which added to its sum of digits gives 22256228.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38900 + ... + 39467.

It is an arithmetic number, because the mean of its divisors is an integer number (3291456).

Almost surely, 2^22256228 is an apocalyptic number.

It is an amenable number.

22256228 is a deficient number, since it is larger than the sum of its proper divisors (17241244).

22256228 is a wasteful number, since it uses less digits than its factorization.

22256228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78442 (or 78440 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 22256228 is about 4717.6506865176. The cubic root of 22256228 is about 281.2875565978.

The spelling of 22256228 in words is "twenty-two million, two hundred fifty-six thousand, two hundred twenty-eight".